Don't want to split hairs here, my book on my 1100 vstar says the load cap is 448#, still with a bigger guy plus the ms. would put it up
there close, if not over, I'm sure there is leeway there for legal purposes, but why push it? Load baggage and then no doubt over.
The ol and me push it, but actual riding you would never know it, the bike performs great,power,handling,stopping. If your dealer will
allow it, test ride with the both of you, get a feel of what you will
have and then you will know for sure. Love vstars, Good luck.